U.S. patent application number 09/870861 was filed with the patent office on 2002-01-24 for water based ink composition for writing instrument.
This patent application is currently assigned to MITSUBISHI PENCIL KABUSHIKI KAISHA. Invention is credited to Miyazaki, Shigeru, Takeuchi, Yoji.
Application Number | 20020007764 09/870861 |
Document ID | / |
Family ID | 18668508 |
Filed Date | 2002-01-24 |
United States Patent
Application |
20020007764 |
Kind Code |
A1 |
Takeuchi, Yoji ; et
al. |
January 24, 2002 |
Water based ink composition for writing instrument
Abstract
A water based ink composition for a writing instrument
containing an N-acylglutamic acid ester and further containing a
colorant, a perfume and water, which is less liable to cause
feathering of the lines and in which a perfume is dispersed and
retained in an aqueous medium in a stable state and the fragrance
lasts long.
Inventors: |
Takeuchi, Yoji;
(Yokohama-shi, JP) ; Miyazaki, Shigeru;
(Yokohama-shi, JP) |
Correspondence
Address: |
Peter C. Schechter
Darby & Darby P.C.
805 Third Avenue
New York
NY
10022
US
|
Assignee: |
MITSUBISHI PENCIL KABUSHIKI
KAISHA
|
Family ID: |
18668508 |
Appl. No.: |
09/870861 |
Filed: |
May 30, 2001 |
Current U.S.
Class: |
106/31.43 ;
106/31.75 |
Current CPC
Class: |
C09D 11/18 20130101;
C09D 11/16 20130101 |
Class at
Publication: |
106/31.43 ;
106/31.75 |
International
Class: |
C09D 011/02 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 1, 2000 |
JP |
2000-164962 |
Claims
What is claimed is:
1. A water based ink composition for a writing instrument
containing an N-acylglutamic acid ester and further containing a
colorant, a perfume and water.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a water based ink
composition for a writing instrument which sheds fragrance in
writing and which imparts faint fragrance as well to drawn
lines.
[0003] 2. Description of the Related Art
[0004] In general, perfumes are oil-soluble, and an emulsifier or a
dispersant which forms protective colloid is required in order to
emulsify or disperse them in water. Water-soluble resins or
surfactants are used as the protective colloid described above. In
almost all water-soluble resins, however, use of a necessary and
sufficient amount of a resin required for dispersing a perfume
raises a viscosity of the liquid and makes it inadequate for an ink
for a writing instrument.
[0005] On the other hand, an emulsion which is prepared using a
surfactant in an amount enough for emulsifying a perfume in a
stable state is reduced in the surface tension to a large extent,
so that an ink prepared using the emulsion has the practical
problem that drawn lines are liable to cause feathering. Further,
an ink prepared merely emulsifying and dispersing a perfume by the
method described above involves the problem that fragrance is shed
immediately after writing but the fragrance is lost soon thereafter
and can not be retained for long time (no durability).
[0006] Those which have so far been known as ink compositions for a
writing instrument containing a perfume shedding fragrance in
writing include, for example, inks for a ball point pen comprising
dyes, resins and organic solvents, wherein a perfume having a
compatibility with the above inks is added (Japanese Patent
Application Laid-Open No. Sho 56-81377), perfume-containing water
based inks blended with a perfume, maltosyl cyclodextrin (MCD), a
colorant and water (Japanese Patent Application Laid-Open No. Sho
63-223078) and water based ink compositions for a writing
instrument comprising a colorant, a perfume, a partially sulfonated
polyester resin and water (Japanese Patent Application Laid-Open
No. Hei 8-283645).
[0007] However, the ink composition disclosed in Japanese Patent
Application Laid-Open No. Sho 56-81377 involves the problem that
even if adding a perfume having compatibility, feathering is caused
on a paper surface in writing. Also, the ink composition disclosed
in Japanese Patent Application Laid-Open No. Sho 63-223078 is
prepared by including a perfume in MCD and adding the above
inclusion compound to a water based ink, and therefore the perfume
contained in this water based ink tends to easily be separated with
the passage of time, particularly with the passage of time at a
high temperature, so that the ink composition involves problems in
dispersibility of the perfume and durability of fragrance. Further,
the ink composition disclosed in Japanese Patent Application
Laid-Open No. Hei 8-283645 involves the problem that fragrance is
shed immediately after writing but the fragrance is lost thereafter
and can not be retained for long time (no durability).
[0008] The present invention intends to solve the problems of the
conventional techniques described above, and an object thereof is
to provide a water based ink composition for a writing instrument
which is less liable to cause feathering and has durability of
fragrance and in which a perfume is dispersed and retained in an
aqueous medium in a stable state.
SUMMARY OF THE INVENTION
[0009] Intensive researches repeated by the present inventors
regarding the problems of the conventional techniques described
above have resulted in successfully obtaining a water based ink
composition for a writing instrument which meets the object
described above by adding a specific ink component to a water based
ink composition for a writing instrument comprising a colorant and
a perfume, and thus the present invention has been completed.
[0010] That is, the water based ink composition for a writing
instrument of the present invention contains an N-acylglutamic acid
ester and further contains a colorant, a perfume and water.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0011] The embodiment of the present invention shall be explained
below in detail.
[0012] The water based ink composition for a writing instrument of
the present invention contains an N-acylglutamic acid ester and
further contains a colorant, a perfume and water.
[0013] The N-acylglutamic acid ester which is used in the present
invention is used for the purposes of a feathering inhibitor, a
fragrance durability-improving agent and inhibiting separation of
the perfume.
[0014] The above-mentioned N-acylglutamic acid ester can be
obtained by acylating glutamic acid, which is an acidic amino acid,
with a natural higher fatty acid and then esterifying the acylated
product with a higher alcohol. The N-acylglutamic acid ester has an
excellent solubility, emulsifiability and dispersability. In the
present invention, all publicly-known N-acylglutamic acid esters
can be used as long as they do not damage the characteristics of
the ink composition of the present invention, and it is possible to
use one kind thereof or in combination of two different kinds or
more thereof.
[0015] Examples of the preferably commercially available
N-acylglutamic acid esters include luaroylglutamic acid
dioctyldodecyl ester "LG-OD", stearoylglutamic acid dioctyldodecyl
ester "SG-OD", lauroylglutamic acid POE(2) octyldodecylether
diester "LGOD-2", lauroylglutamic acid POE(5) octyldodecylether
diester "LGOD-5", lauroylglutamic acid POE(2) stearylether diester
"LGS-2" and lauroylglutamic acid POE(5) stearylether diester
"LGS-5", all of which are manufactured by Nihon Emulsion Co.,
Ltd.
[0016] In the present invention, a mixture of at least one of the
respective N-acylglutamic acid esters described above has a content
of 0.01 to 10% by weight, preferably 0.5 to 5% by weight based on
the total amount of the ink composition.
[0017] If a content of the N-acylglutamic acid ester is less than
0.01% by weight based on the total amount of the ink composition,
the feathering-inhibiting effect, the fragrance
durability-improving effect and the perfume separation-inhibiting
effect are inferior, and the effects of the present invention can
not be displayed. On the other hand, if the content exceeds 10% by
weight, the ink is less liable to be dried when transferred onto a
paper face, and when it is used for a ball point pen, a discharge
amount of the ink from the pen tip is reduced. Accordingly, the
such contents are not preferred.
[0018] The colorant used in the present invention includes, for
example, pigments and water soluble dyes.
[0019] The pigment shall not specifically be restricted and
includes at least one selected from inorganic and organic pigments,
titanium oxide and pseudo pigments obtained by coloring resin
emulsions with dyes, all of which are conventionally used for a
water based ink.
[0020] The inorganic pigments include, for example, carbon black,
metal powder and the like.
[0021] The organic pigments include, for example, azo lakes,
insoluble azo pigments, chelate azo pigments, phthalocyanine
pigments, perylene and perinone pigments, anthraquinone pigments,
quinacridone pigments, dye lakes, nitro pigments and nitroso
pigments.
[0022] To be specific, included are inorganic pigments such as
carbon black, titanium black, zinc oxide, red iron oxide, chromium
oxide, mica titan, black iron oxide, cobalt blue, yellow iron
oxide, viridian, zinc sulfide, lithopone, cadmium yellow,
vermilion, cadmium red, chrome yellow, molybdate orange, zinc
chromate, strontium chromate, white carbon, clay, talc,
ultramarine, precipitated barium sulfate, baryte powder, calcium
carbonate, white lead, Prussian blue, manganese violet, aluminum
powder and bronze powder, C. I. Pigment Blue 1, C. I. Pigment Blue
15, C. I. Pigment Blue 17, C. I. Pigment Blue 27, C. I. Pigment Red
5, C. I. Pigment Red 22, C. I. Pigment Red 38, C. I. Pigment Red
48, C. I. Pigment Red 49, C. I. Pigment Red 53, C. I. Pigment Red
57, C. I. Pigment Red 81, C. I. Pigment Red 104, C. I. Pigment Red
146, C. I. Pigment Red 245, C. I. Pigment Yellow 1, C. I. Pigment
Yellow 3, C. I. Pigment Yellow 12, C. I. Pigment Yellow 13, C. I.
Pigment Yellow 14, C. I. Pigment Yellow 17, C. I. Pigment Yellow
34, C. I. Pigment Yellow 55, C. I. Pigment Yellow 74, C. I. Pigment
Yellow 83, C. I. Pigment Yellow 95, C. I. Pigment Yellow 166, C. I.
Pigment Yellow 167, C. I. Pigment Orange 5, C. I. Pigment Orange
13, C. I. Pigment Orange 16, C. I. Pigment Violet 1, C. I. Pigment
Violet 3, C. I. Pigment Violet 19, C. I. Pigment Violet 23, C. I.
Pigment Violet 50, and C. I. Pigment Green 7.
[0023] The pseudo pigments obtained by coloring resin emulsions
with dyes include, for example, those obtained by coloring resins
comprising copolymers of acrylonitrile, styrene and methyl
methacrylate with dyes.
[0024] Any of direct dyes, acid dyes, food colors and basic dyes
can be used for the water-soluble dyes.
[0025] The direct dyes include, for example, C. I. Direct Black 17,
ditto 19, ditto 22, ditto 32, ditto 38, ditto 51 and ditto 71, C.
I. Direct Yellow 4, ditto 26, ditto 44 and ditto 50, C. I. Direct
Red 1, ditto 4, ditto 23, ditto 31, ditto 37, ditto 39, ditto 75,
ditto 80, ditto 81, ditto 83, ditto 225, ditto 226 and ditto 227,
C. I. Direct Blue 1, ditto 15, ditto 71, ditto 86, ditto 106 and
ditto 119.
[0026] The acid dyes include, for example, C. I. Acid Black 1,
ditto 2, ditto 24, ditto 26, ditto 31, ditto 52, ditto 107, ditto
109, ditto 110, ditto 119 and ditto 154, C. I. Acid Yellow 7, ditto
17, ditto 19, ditto 23, ditto 25, ditto 29, ditto 38, ditto 42,
ditto 49, ditto 61, ditto 72, ditto 78, ditto 110, ditto 127, ditto
135, ditto 141 and ditto 142, C. I. Acid Red 8, ditto 9, ditto 14,
ditto 18, ditto 26, ditto 27, ditto 35, ditto 37, ditto 51, ditto
52, ditto 57, ditto 82, ditto 87, ditto 92, ditto 94, ditto 115,
ditto 129, ditto 131, ditto 138, ditto 186, ditto 249, ditto 254,
ditto 265 and ditto 276, C. I. Acid Violet 15 and ditto 17, C. I.
Acid Blue 1, ditto 7, ditto 9, ditto 15, ditto 22, ditto 23, ditto
25, ditto 40, ditto 41, ditto 43, ditto 62, ditto 78, ditto 83,
ditto 90, ditto 93, ditto 103, ditto 112, ditto 113, and ditto 158,
C. I. Acid Green 3, ditto 9, ditto 16, ditto 25 and ditto 27.
[0027] A large part of the food colors is included in the direct
dyes and the acid dyes, and one example of those which are not
included therein includes C. I. Food Yellow 3.
[0028] The basic dyes include, for example, C. I. Basic Yellow 1,
ditto 2 and ditto 21, C. I. Basic Orange 2, ditto 14 and ditto 32,
C. I. Basic Red 1, ditto 2, ditto 9 and ditto 14, C. I. Basic
Violet 1, ditto 3 and ditto 7, C. I. Basic Green 4, C. I. Basic
Brown 12, C. I. Basic Black 2 and ditto 8.
[0029] These dyes each may be used alone or in combination of two
or more kinds thereof.
[0030] A content of these colorants is 0.5 to 40% by weight,
preferably 1 to 30% by weight based on the total amount of the ink
composition.
[0031] The perfume used in the present invention includes, for
example, those described in the following 1) to 6), and they each
may be used alone or in combination of two or more kinds
thereof:
[0032] 1) Essential oils such as grape fruit oil, orange oil, lemon
oil, lime oil, ylang ylang oil, cammomile oil, jasmin oil, hiba
oil, peppermint oil, lavender oil and rosemary oil.
[0033] 2) Terpenes such as .alpha.-pinene, .beta.-pinene and
limonene.
[0034] 3) Alcohols such as linalool, 1-menthol, geraniol, borneol,
lavandulol, hexyl alcohol, phenylethyl alcohol (Rose P), furfuryl
alcohol, cyclotene, maltol, eugenol and .alpha.-phenylethanol.
[0035] 4) Aldehydes such as heptanal, octanal, dodecanal,
tetradecanal, hexadecanal, citral, lyral, benzaldehyde and cyclamen
aldehyde.
[0036] 5) Esters such as ethyl acetate, propyl acetate, amyl
acetate, linallyl acetate, benzyl acetate, dimethylbenzyl-carbinyl
acetate and benzyl propionate.
[0037] 6) Aromatic compounds such as nootkatone, ethylpyrazine,
lemon terpeneless, orange terpeneless, ethylvanillin and
furfurylmercaptan.
[0038] In the present invention, capable of being used as well are
mixed perfumes prepared by suitably combining the respective
perfumes described above, for example, banana perfume, blueberry
perfume, vanilla perfume, mint perfume, apple perfume, peach
perfume, melon perfume, pineapple perfume, grape perfume, lilac
perfume and jasmin perfume.
[0039] For example, the banana perfume can be prepared by suitably
blending vanillin, ethylvanillin, n-hexanal, isoamyl alcohol,
trans-2-hexenal, n-butanol, isoamyl acetate, butyl acetate,
isobutyl acetate, diacetyl, ethyl acetate, hexyl acetate, isoamyl
butyrate, isoamyl isovalerate, cis-3-hexenol, cis-3-hexenyl
acetate, acetic acid, isoeugenol, ethyl butyrate and a solvent.
Further, the pineapple perfume can be prepared by suitably blending
benzyl acetate, orange oil 3-fold, vanillin, isoamyl acetate,
isoamyl butyrate, ethyl acetate, ethyl heptanoate, ethyl hexanoate,
ethyl butyrate and allyl hexanoate.
[0040] Further, capable of being used as well are commercially
available various mixed perfumes, for example, vanilla perfume
[Vanilla BVK-3359 (manufactured by Takasago International
Corporation)], mint perfume [Mint THP-8148 (manufactured by T.
Hasegawa Co., Ltd.)], banana perfume [Banana T-1510 (manufactured
by Yamamoto Perfumery Co., Ltd.)] and blueberry perfume [Blueberry
V-647 (manufactured by Yamamoto Perfumery Co., Ltd.)].
[0041] A content of these perfumes falls in a range of 0.01 to 10%
by weight, preferably 0.1 to 6% by weight based on the total amount
of the ink composition.
[0042] If a content of these perfumes is less than 0.01% by weight,
fragrance does not last long and comes to be not smelt. On the
other hand, if it exceeds 10% by weight, an adverse effect is
exerted on the aging stability of the ink composition. Accordingly,
both ranges are not preferred.
[0043] In the present invention, the perfume is used in a range of
the content (0.01 to 10% by weight) described above and added
preferably in an amount of 70% or less, more preferably 60% or less
in terms of a weight ratio based on the above-mentioned
N-acylglutamic acid esters (one N-acylglutamic acid ester or a
mixture of two or more N-acylglutamic acid esters).
[0044] Setting this weight ratio makes it possible to further
display the feathering inhibiting effect, the fragrance
durability-improving effect and the perfume separation-inhibiting
effect.
[0045] In the present invention, when the pigment notably settles
down, a viscosity-controlling agent is preferably added from a
viewpoint of preventing settling.
[0046] The viscosity-controlling agent used includes at least one
selected from synthetic polymers, natural gums, celluloses and
polysaccharides.
[0047] The synthetic high polymers include, for example,
polyacrylic acid and cross-linking type copolymers thereof,
polyvinyl alcohol, polyvinylpyrrolidone and derivatives thereof,
and polyvinyl methyl ether and derivatives thereof. The natural
rubbers and the polysaccharides include, for example, tragacanth
gum, guar gum, locust bean gum and xanthan gum. The celluloses
include methyl cellulose, ethyl cellulose, hydroxyethyl cellulose
and carboxymethyl cellulose.
[0048] To be specific, included are commercial products such as
"Junron PW-111" manufactured by Nihon Junyaku Co., Ltd., "Hiviswako
104" manufactured by Wako Pure Chemical Ind. Co., Ltd., "KELZAN",
UKELZAN AR", "KlA96", "KlA112", "RHEOZAN" and "K7C233" manufactured
by Sansho Co., Ltd., "JAGUAR HP-8", "JAGUAR HP-60", "RHODOPOL 23"
and "RHODOPOL 50MC" manufactured by Rhone Poulenc Japan Ltd., and
"Echo Gum GM" manufactured by Dainippon Pharmaceutical Co.,
Ltd.
[0049] A content of these viscosity-controlling agents is
preferably 0.1 to 1.5% by weight based on the total amount of the
ink composition. The content varies depending on the kind of the
viscosity-controlling agents, and it is preferably 0.1 to 1.5% by
weight in the case of the synthetic polymers and preferably 0.1 to
0.8% by weight in the case of the natural polysaccharides.
[0050] If a content of these viscosity-controlling agents is less
than 0.1% by weight, the effect of adding the viscosity-controlling
agent can not be exhibited. On the other hand, if it exceeds 1.5%
by weight, the ink is reduced in fluidity so that writing is liable
to be inferior because of the poor flowability.
[0051] Other components (optional components) which are used for an
ink composition for a writing instrument can further be added, if
necessary, to the ink composition of the present invention as long
as the effects of the present invention are not damaged.
[0052] Capable of being suitably selected and used as the other
usable components are, for example, solvents including
water-soluble polyhydric alcohols such as ethylene glycol,
propylene glycol and glycerin, cellosolves such as ethylene glycol
monomethyl ether (methyl cellosolve) and ethylene glycol monoethyl
ether (ethyl cellosolve), carbitols such as diethylene glycol
monomethyl ether (methyl carbitol) and diethylene glycol monoethyl
ether (ethyl carbitol) and glycol ether esters such as ethylene
glycol monoethyl ether acetate; pH adjusting agents including
ammonia, urea, monoethanolamine, diethanolamine, triethanolamine,
alkalin metal salts of carbonic acid and phosphoric acid such as
sodium tripolyphosphate and sodium carbonate, and hydroxides of
alkalin metals such as sodium hydroxide; preservatives or
fungicides including phenol, sodium omadine, sodium
pentachlorophenol, 1,2-benzisothiazoline-3-one,
2,3,5,6-tetrachloro-4-(methylsulfonyl)pyridine, alkalin metal salts
of benzoic acid, sorbic acid and dehydroacetic acid such as sodium
benzoate, and benzimidazole base compounds; rust preventives such
as benzotriazole, dicyclohexylammonium nitrite, diisopropylammonium
nitrite and tolyltriazole; lubricants, wetting agents, and
defoaming agents comprising; anionic surfactants such as carbonic
acids and sulfonic acids; cationic surfactants such as ammonium
salts and amines; other amphoteric surfactants; and nonionic
surfactants.
[0053] Water used in the present invention includes purified water
and ion-exchanged water, and a content thereof is a remainder
(balance) of the total content of the respective components
described above.
[0054] The water based ink composition for a writing instrument of
the present invention can suitably used for a ball point pen, a
brush pen, a felt tip pen and a marker.
[0055] In the water based ink composition for a writing instrument
of the present invention thus constituted, in order to solve the
respective problems described above caused when using the perfume,
added as well as the colorant, the perfume and water is the
N-acylglutamic acid ester which has a function as a feathering
inhibitor, a function as a fragrance durability-improving agent and
a function for inhibiting separation of the perfume, whereby
exhibited are specific actions that the lines are less liable to
cause feathering and fragrance is durable and that the perfume is
dispersed and retained in an aqueous medium in a stable state
(these points shall further be explained in detail in examples
described later).
EXAMPLES
[0056] The present invention shall be explained below in detail
with reference to examples and comparative examples, but it is a
matter of course that the present invention shall not be restricted
to the examples described below.
[0057] Examples 1 to 10 and Comparative Examples 1 to 3
[0058] Water based ink compositions for a writing instrument were
prepared according to blending formation shown in the following
Table 1.
[0059] The water based ink compositions obtained in Examples 1 to
10 and Comparative Examples 1 to 3 were evaluated for feathering of
the ink, fragrance, separation of the perfume, coagulation of the
pigment and writing feeling by the following evaluation methods.
Ball point pens for evaluation were prepared to evaluate feathering
of the ink, fragrance and writing feeling.
[0060] The results thereof are shown in the following Table 1.
[0061] Preparation of ball point pens for evaluation:
[0062] The respective inks were charged into refills comprising a
polypropylene-made ink reservoir with an inner diameter of 4.0 mm
and a length of 115 mm having no feed and a stainless steel-made
tip with a ball having a diameter of 0.7 mm to prepare ball point
pens for evaluation (UM-100 manufactured by Mitsubishi Pencil K.
K.).
[0063] Evaluation method of feathering:
[0064] The ball point pen was used to write on a paper face (wood
free paper) and sensorily evaluated according to the following
evaluation criteria.
[0065] Evaluation criteria:
[0066] .largecircle.: no feathering and clear lines
[0067] .DELTA.: feathering observed and unclear lines
[0068] X: very unclear lines due to feathering
[0069] Evaluation method of fragrance:
[0070] The ball point pen was used to write on a paper face (wood
free paper) and sensorily evaluated according to the following
evaluation criteria.
[0071] Evaluation criteria:
[0072] .largecircle.: smell in writing, and the lines smell even
after 5 hours
[0073] X: smell in writing, but the lines do not smell after 5
hours
[0074] Evaluation method of separation of the perfume:
[0075] The respective inks were tightly sealed in a vessel and left
standing in a constant temperature chamber of 50.degree. C. for 7
days, and then it was left cooling to evaluate the state of the
inks according to the following evaluation criteria.
[0076] Evaluation criteria:
[0077] .largecircle.: no change from before the test
[0078] X: perfume separated
[0079] Evaluation method of coagulation of the pigment:
[0080] The respective inks were tightly sealed in a vessel and left
standing at room temperature for one week, and then it was passed
through a sieve of 100 .mu.m and evaluated according to the
following evaluation criteria. This pigment was evaluated for
coagulation in order to evaluate a dispersion stability of the
pigment.
[0081] Evaluation criteria:
[0082] .largecircle.: no residue
[0083] X: the ink is hard to pass through the sieve or residue was
present on the sieve
[0084] Evaluation method of writing feeling:
[0085] The ball point pen was used to write on a paper face (wood
free paper) and evaluated the writing feeling according to the
following evaluation criteria.
[0086] Evaluation criteria:
[0087] {circle over (.smallcircle.)}: very smooth writing
feeling
[0088] .largecircle.: smooth writing feeling
[0089] .DELTA.: writing feeling having a little poor smoothness
[0090] X: very heavy writing feeling, and unpleasant feeling such
as scratching is given (unusable level)
1TABLE 1 (% by weight) Comparative Example Example Remark 1 2 3 4 5
6 7 8 9 10 1 2 3 Blend- Color- Blue pigment (1) 10.0 10.0 10.0 10.0
ing ant Yellow pigment (2) 10.0 10.0 10.0 Forma- White pigment (3)
20.0 20.0 2.0 20.0 10.0 tion Pearl pigment (4) 5.0 Lubricant (5)
0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 Propylene glycol --
5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 Xanthan gum (6)
0.1 0.1 0.1 0.1 0.1 0.1 0.1 N-acylglutamic acid (7) 5.0 5.0 5.0 5.0
2.5 ester (8) 5.0 5.0 5.0 (9) 5.0 5.0 2.5 Per- Perfume A (10) 1.0
1.0 1.0 1.0 fume Perfume B (11) 1.0 1.0 1.0 1.0 Perfume C (12) 1.0
1.0 1.0 1.0 Perfume D (13) 2.0 Water (purified water) -- 78.4 77.5
78.4 68.4 68.4 83.4 86.4 78.5 79.0 68.4 83.5 83.5 83.4 Evalu-
Feathering .largecircle. .largecircle. .largecircle. .largecircle.
.largecircle. .largecircle. .largecircle. .largecircle.
.largecircle. .largecircle. .largecircle. .DELTA. .largecircle.
ation Fragrance .largecircle. .largecircle. .largecircle.
.largecircle. .largecircle. .largecircle. .largecircle.
.largecircle. .largecircle. .largecircle. X X X Separation of
perfume .largecircle. .largecircle. .largecircle. .largecircle.
.largecircle. .largecircle. .largecircle. .largecircle.
.largecircle. .largecircle. X X .DELTA. Coagulation of pigment
.largecircle. .largecircle. .largecircle. .largecircle.
.largecircle. .largecircle. .largecircle. .largecircle.
.largecircle. .largecircle. X X X Writing feeling .circleincircle.
.circleincircle. .circleincircle. .circleincircle. .circleincircle.
.circleincircle. .circleincircle. .circleincircle. .largecircle.
.circleincircle. .largecircle. .largecircle. .largecircle.
[0091] The remarks shown in Table 1 mean the followings:
[0092] (1) Phthalocyanine blue (Chromofine Blue 4965 manufactured
by Dainichiseika Color & Chemicals MFG. Co., Ltd.)
[0093] (2) Lacqutimine color (Golden Yellow FL2R Conc manufactured
by Dainichiseika Color & Chemicals MFG. Co., Ltd.)
[0094] (3) Titanium oxide: Tipure R-900 (manufactured by Du Pont
Co., Ltd.)
[0095] (4) Iriodin 303 Royal Gold (manufactured by Merck Japan,
Ltd.)
[0096] (5) Potassium oleate
[0097] (6) KELZAN (manufactured by Sansho Co., Ltd.)
[0098] (7) Stearoylglutamic acid dioctyldodecyl ester (SG-OD
manufactured by Nihon Emulsion Co., Ltd.)
[0099] (8) Lauroylglutamic acid POE(5) octyldodecylether diester
(LGOD-5 manufactured by Nihon Emulsion Co., Ltd)
[0100] (9) Lauroylglutamic acid POE(5) stearylether diester (LGS-5
manufactured by Nihon Emulsion Co., Ltd)
[0101] (10) Banana perfume [Banana T-1510 (manufactured by Yamamoto
Perfumery Co., Ltd.)
[0102] (11) Blueberry perfume [Blueberry V-647 (manufactured by
Yamamoto Perfumery Co., Ltd.)
[0103] (12) Vanilla perfume [Vanilla BVk-3359 (manufactured by
Takasogo International Corporation)
[0104] (13) Mint perfume [Mint THP-8148 (manufactured by T.
Hasegawa Co., Ltd.)
[0105] Consideration of Table 1
[0106] As apparent from the results shown in Table 1 described
above, it has been confirmed that in Examples 1 to 10 falling in
the scope of the present invention, feathering of the ink is not
observed and fragrance lasts long as compared with Comparative
Examples 1 to 3 falling outside the scope of the present invention
and that separation of the perfume and coagulation of the pigment
are not caused and very smooth writing feeling is gained.
[0107] In contrast with this, Comparative Examples 1 to 3 are cases
in which the N-acylglutamic acid ester which is the essential
components in the present invention and has a function as a
feathering inhibitor, a function as a fragrance
durability-improving agent and a function for inhibiting separation
of the perfume are not contained, and it has been confirmed that in
these cases, all evaluation items of feathering of the ink,
fragrance, separation of the perfume and coagulation of the pigment
can not be satisfied.
* * * * *